Furnace.



No. 871,651. 'PATBNTED NOV. 19, V1907. W. STUBBLEBINE.

APPLICATION FILED JULY 8. 1907.

s SHBBTSQSHBBT 2.

ms Nokms rErsRs cn., wAsmmrroN, n. c

rPATBNTFD Nov. 19, 1907.

W. STUBBLEBINE.

PURNACE.

APPLICATION FILED JULY 8.1907.

8 SHEETS-SHEET 3.

attotnm ms Naam: Psrxres co., wAsHlNnroN, o. C.

WILLIAM STUBBLEBINE, OF CORAOPOLIS, PENNSYLVANIA.

FURNACEL Specification of Letters Patent.

Patented Nov. 19, 1907.

Application filed July S, 1907. Serial No. 382.685.

To all whomit may concern:

Be it known that I, WILLIAM STUBBLE- BINE, a citizen of the UnitedStates, residing full, clear, and exact description of the invention,suchas will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to metallurgical fur* naces and is applicable toall kinds of such furnaces.

It has for its object to effect more nearly the complete or perfectcombustion of the fuel than has heretofore been possible with previouslyknown constructions.

The inventionV consists in the features of construction and combinationsof devices hereinafter described and specified in the claims.

In the accompanying drawings, illustrating the preferred embodiment ofmy invention: Figure l is a longitudinal vertical section of a furnaceequipped with my invention. Fig. 2 is a horizontal section thereof, andFig'.` 3, is an enlarged vertical section through the recuperator.

Referring more particularly to the drawings, 1 designates the fire boxand 2 the working chamber of the furnace 3. The structure which I- callthe recuperator is built at the end of the fire box` The bottomreservoir 4 of the recuperator receives the air blast from the pipe 5and from thence said blast passes up through passages in spaced apartsets of bricks 6 constituting the main structure of the recuperator andenters the fire box over the Wall or partition 7. Said air blast createsan induced current which draws a portion of the gases from the lire boxthrough ports 8 in said wall 7 into the spaces 9 between the sets ofbricks 6. Said gases pass up through these spaces and enter the fire boxagain over the wall 7. The blast under the rate 10 enters at 11 andpasses through the e box commingling with the mixed air and gas from therecuperator thereby causing perfect combustion.

As is well known, the product of combustion when the air first comes incontact with the lower layer of fuel and the grate bars is carbonio acidand this carbonic acid in passing through the upper layers of fuel takesup carbon and becomes carbonie oxid. In

doing this the larger part of the heat developed in the first stage ofthe process of combustion is lost, one Volume of C()z becoming twovolumes of CO. ljy means of my recuperator the desired additional oxygenis furnished to the fire box.

The sets of bricks 6 comprising the main structure of the recuperatorare supported upon a plate 12 which separates them from the bottomreservoir or compartment 4. Said bricks are preferably arranged ondiverging lilies so that the spaces 9 between them are flared away fromthe ports 8 which are also flared to correspond. The plate l2 hasperforations 13 therein registering with the passages in said bricks butthe spaces 9 are cut oil from the reservoirs 4 by said plate. As shown,each row or set of bricks comprises six bricks arranged in horizontalpairs, one above another. The four lower bricks 6a are formed withvertical passages lll, those of the upper pair registering with those ofthe lower pair. Said upper pair of bricks 6a reach up to a level withthe top of the partition or wall 7. 'The top pair of bricks 6b form anarch over the passages in the lower bricks and serve to deliver the airover the wall 7 to the fire box. As illustrated said bricks 6b haveshort vertical passages 15 registering with the passages 14 in thebricks 6a and opening on a horizontal passage 16. The gases which aresucked in through the ports 8 into the spaces 9 pass over the wall 7between the sets or pairs of bricks 6b.

I claim: f

l. In a furnace of the character described, the combination, with thefire box, the working chamber and means to deliver an air blast belowthe grate in said lire box, of a recuperator arranged at the end of thefire box and separated therefrom by a wall which does not extend to theroof of said fire box, and means to deliver air and gas through saidrecuperator to said lire box over said wall.

2. In a furnace of the character described, the combination, with thefire box, the working chamber and means to deliver an air `blast belowthe grate in said fire box, of a recuperator arranged at the end of saidfire box and separated therefrom by a wall, spaced apart sets of bricksin said recuperator having vertical passages through Which an air blastis delivered over said wall into the lire box and means to draw gas fromthe re box in the spaces between said sets of bricks and to deliver saidgas over said wall into said fire box again.

3. In a furnace of the character described, the combination, with thefire box, the working chamber and means to deliver an air blast belowthe grate in said fire box, of a recuperator arranged at the end of saidfire box and separated therefrom by a wall, diverging spaced apart setsof bricks in said recuperator having vertical passages through which anair blast is delivered over said wall into the fire box, and means todraw gas from the fire box into the spaces between said sets of bricksand to deliver said gas over said wall into said fire box again.

4. In a furnace of the character described,

the combination, with the fire box, the working chamber and means todeliver an air blast below the grate in said fire box, of a recuperatorarranged at the end of said fire box and separated therefrom by a wall,and diverging spaced apart sets of bricks in said recuperator havingvertical passages through which an air blast is delivered over said wallinto the fire box, said wall having 'liared openings leading to theflared spaces between said sets of bricks through which gas is drawn tobe delivered again over said wall.

5. In a furnace of the character described, the combination, with thefire box, the working chamber and meansv to deliver an air blast belowthe grate in said fire box, of a recuperator arranged at the end of saidfire box and separated therefrom by a wall, spaced apart sets of bricksin said recuperator having vertical passages, the top bricks havinghorizontal passages whereby an air blast is delivered over said wallinto the fire box, and means to draw gas from the fire box into thespaces between said sets of bricks to be delivered again to said firebox over said wall.

6. In a furnace of the character described,

the combination, with the fire box, the workinfr chamber and means todeliver an air blst below the grate in said re box, of a recuperatorarranged at the end of said fire box and separated therefrom by a wall,spaced apart sets of bricks in said recuperator, the lower bricks havingvertical passages and the top bricks having vertical passagesregistering with those in the lower bricks and horizontal passagescommunicating with said vertical passages to deliver air therefrom tothe fire box over said wall, and means to draw gas from the fire boxinto the spaces between said sets of bricks, to be delivered again tosaid fire box over said wall.

7. In a furnace of the character described, the combination, with thefire box, the working chamber and means to deliver an air blast belowthe grate in said 'lire box, of a recuperator arranged at the end ofsaid fire box and separated therefrom by a wall, spaced apart sets ofbricks in said recuperator, the lower bricks having vertical passagesand extending up to a level with the top of the wall, the top brickshaving horizontal passages whereby an air blast is delivered over saidwall into the fire box, and means to draw gas from the fire box into thespaces between said sets of bricks to be delivered again to said firebox over said wall.

In testimony whereof, I affix my signature, in presence of twowitnesses.

WILLIAM STUBBLEBINE. Witnesses:

Giras. H. STEvENsEN, W. A. STUBBLEBINE.

